Improvement in coal-oil lanterns



J. W. SCHHEIBER.

Lantern.

Patented Sept. 1862;

A No. 36,371.

iss es."

Ny PETER@ FholmLAhagmphor, Washington, D, C.

llNrreD STATES PATENT OFFICEn JOHN W. SOHREIBER, OF NEW YORK, N. Y.

IMPROVEMENT IN COAL-OIL. LANTERNS.

Specification forming part of Letters Patent No. 36,37 l, datedSeptember 2, 1862.

To all whom t may concern; f

Be it known that I, JOHN W. SOHREIBER, o the city, county, and State ofNew York, have invented a new and useful Improvement in Lanterns forBurning Coal-Oil; and Ido hereby declare that the following is a full,clear, and exact description of the same, reference being had to theaccompanying drawings, making a part of this specification, in which-Figure l is a sectional elevation of my invention, taken in the line acfr, Fig. 2; Fig. 2, a horizontal section of the same, taken in the liney y, Fig. l.

Similar letters of reference indicate corresponding parts in the twofigures.

This invention consists in constructing the body or fountain of the lampwith an external rim or case of cylindrical form and also with apolygonal or corrugated iiange of such diameter that it may iit withinthe external rim or case of the lamp between it and the body or fountainand form circuitous air-induction passages, through which the flame issupplied with air, these parts being used in connecv tion with adraft-chimney provided at its upper part with a jacket or skirt, allarranged in such a manner as to form a convenient and economical lanternfor burning coal-oil with a brilliant flame.

To enable those skilled in the art to fully nnderstand and construct myinvention, I will proceed to describe it.

A represents the lamp of the laut-ern, the body or fountain B being ofcylindrical form and provided with a burner, O, of ordinaryconstruction, as shown in Fig. 1. The body or fountain B of thelamp isencompassed at its lower part by a cylindrical rim or case, D, which isconcentric with the body or fountain B of the lamp and somewhat largerin diameter to' admit of a space, a, between them in` which a polygonalor corrugated flange, F, is

fitted and permanently secured. The flange F does not extend down to thebottom of the lamp, a considerable space being allowed be: neath it, asshown at b in Fig. l.

The base G of the lantern is formed of an arched or dome-shaped metalplate having an annular opening, c, at its center to admit of the concof the burner passing through it, said opening c being provided with auannular pendent rim, d, the lower edge of which iits into the top of theburner, as shown in Fig. 1.

The lamp A is attached to the base G by means of springcatches e, whichpass through perforationsf near the outer edge ofthe base. The base G isprovided with an annular pendent iiange, g,which,when the lamp isattached to the lantern, fits Within the upper part of the polygonal orcorrugated flange F.

H is the chimney of the lamp, the lower end of which is attached to theupper surface of the base G concentrically with the opening c therein,the base being perforated, as shown at d, all around the opening c andwithin the chimney H. (See Fig. l.)

The chimney H is surrounded by wireguards I, which may be arranged inthe usual way, the upper ends of the upright guards being attached to anannular plate, J, which is fitted on the upper'part of the chimney andpermanently attached to it, the upper part of the chimney being of metaland the lowepart of mica or glass. The upper part of the chimney isencompassed by a skirt or jacket, K, the lower end of which is attachedto the plate J. This skirt or jacket is larger in diameter than theupper part of the chimney H, so as to admit of a space, e, between themwhich communicates with the external air by means of perforations f inthe plate J. The upper end of the skirt or jacket K has a horizontaltube, L, attached, the ends of which communicate with short pendenttubes g g', as shown in Fig. l. The shaft gx, which is provided with thewheels It for raising and lowering the wick, has a space, i, made on oneend of it to receive a key, M, which is inserted through an opening inthe flange F to admit of the adjustment of the wick without detachingthe lamp from the lantern.

The tlameof the lamp is supplied with air through thespaces formed bythe polygonal or corrugated iiange F in the space a between the rim orcase D and the body or fountain of the lamp, as indicated by the arrowsin Fig. 1. This circuitous route of the air insures a uniform draftwithin the lantern, so that the flame will be supplied evenly with airand a flickering or inconstant ame avoided. The skirt or jacket K formsa draft-passage around the upper part of the chimney and greatlyincreases the draft through the chimney H, as thereis a rapid currentthrough the space e, caused by the rarefaction of the air therein by theheat of the chimney, and this strong curi rent through' e induces adraft in the chimney H. The horizontal and pendent tubes L g g protectthe lame from downward or back drafts, which would be frequently causedby sudden gusts of wind. The polygonal flange F, it will be seen, is avery simple and efflcient way for obtaining` circuitous draft-passages,as the angles a., formed by the junction of the several sides, b', andthe Contact of the central parts of the latter with the body B of thelamp, serve as partitions in the space a and divide said space intoaseries of compartments, c c, the air passing down the former and upwardthrough the latter into the lantern. (See Fig. 2.) This advantage, however, is not confined strictly to a polygonal flange. A crimped orcorrugated one would JOHN W. SCHREIBER.

litnesses: RroHARDsoN GAWLEY, JAMES LAIRD.

